期刊
ASTRONOMY & ASTROPHYSICS
卷 609, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201732034
关键词
protoplanetary disks; stars: pre-main sequence; stars: variables: T Tauri, Herbig Ae/Be; planets and satellites: formation
资金
- ANR of France [ANR16-CE31-0013]
- University of Hawaii with National Aeronautics and Space Administration [NNH14CK55B]
- Division Of Astronomical Sciences [1517014] Funding Source: National Science Foundation
We report on the discovery of correlations between dust and CO gas tracers of the 0.1-10 au region in planet-forming disks around young intermediate-mass stars. The abundance of refractory elements on stellar photospheres decreases as the location of hot CO gas emission recedes to larger disk radii, and as the near-infrared excess emission from hot dust in the inner disk decreases. The linked behavior between these observables demonstrates that the recession of infrared CO emission to larger disk radii traces an inner disk region where dust is being depleted. We also find that Herbig disk cavities have either low (similar to 5-10%) or high (similar to 20-35%) near-infrared excess, a dichotomy that has not been captured by the classic definition of pre-transitional disks.
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